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=========================================================== Ubuntu Security Notice USN-567-1 January 10, 2008 dovecot vulnerability CVE-2007-6598 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 7.04 Ubuntu 7.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 7.04: dovecot-imapd 1.0.rc17-1ubuntu2.2 dovecot-pop3d 1.0.rc17-1ubuntu2.2 Ubuntu 7.10: dovecot-imapd 1:1.0.5-1ubuntu2.1 dovecot-pop3d 1:1.0.5-1ubuntu2.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: It was discovered that in very rare configurations using LDAP, Dovecot may reuse cached connections for users with the same password. As a result, a user may be able to login as another if the connection is reused. The default Ubuntu configuration of Dovecot was not vulnerable.